Estimate your Self Assessment tax bill if you're self-employed

Use the self-employed tax calculator to estimate your Self Assessment tax bill for the 2024 to 2025 tax year.

Enter your estimated weekly or monthly profit to get an idea of how much Income Tax and Class 4 National Insurance you’ll pay.

The estimate you get will be calculated as if you get the standard Personal Allowance.

It will not take into account:

  • any payments made for previous tax bills - known as payments on account
  • any other taxable income you get that’s not from self-employment (like income from property)

This service is also available in Welsh (Cymraeg).

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Part of Set up as a sole trader: step by step

  1. Step 1 Check if being a sole trader is right for you

    1. Find out more about becoming a sole trader

  2. Step 2 Choose your business name

    1. Check the rules for naming your business

  3. Step 3 Check what records you need to keep

    When you start trading you must keep records. This will help you work out your profit or loss for your tax return.

    1. Find out what business records you need to keep

  4. Step 4 Register as a sole trader

    1. Check how to register as a sole trader

  5. Step 5 Check if you need to register for VAT

    1. Find out more about when to register for VAT

  6. Step 6 Plan for your tax bill

    You may need to pay Income Tax on your profits and may need to pay National Insurance contributions.

    1. You are currently viewing: Get an estimate of how much you will need to pay
    1. Find out more about Income Tax rates
    1. Find out more about National Insurance rates

  7. Step 7 Get help and support

    1. Sign up for business support emails
    1. Join a webinar or watch a video to learn more about your responsibilities
    1. Find out how to choose a tax agent if you want to use one